From 17703b92b44e5afd12e4bca418f61cadb50ac91d Mon Sep 17 00:00:00 2001
From: Josh Rahm <rahm@google.com>
Date: Mon, 22 Aug 2022 13:44:02 -0600
Subject: Add command motion and make some changes to substitute.

---
 plugin/substitute.vim | 59 ++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 54 insertions(+), 5 deletions(-)

(limited to 'plugin/substitute.vim')

diff --git a/plugin/substitute.vim b/plugin/substitute.vim
index 2c08310..982a76b 100644
--- a/plugin/substitute.vim
+++ b/plugin/substitute.vim
@@ -1,7 +1,56 @@
-" C-s in normal mode will replace all the occurences of the last register with
-" what was typed in the provided body.
-noremap <C-s> :set operatorfunc=DoSubstitution<cr>g@
 
-function DoSubstitution(str) abort
-  exec printf(":'[,']s/%s/%s/g", @", @.)
+" gs will create a substitution command to replace the last yanked string with
+" the last inserted string over a motion.
+"
+" This is useful when renaming a variable for example, one can place the cursor
+" over the varibale to rename and type:
+"
+" ciwnew_variable_name<esc>gsiB
+"
+" and this will replace that variable name with 'new_variable_name' inside the
+" Body.
+
+noremap  <silent> gs :set operatorfunc=<SID>do_subst_enter<cr>g@
+vnoremap <silent> gs :call <SID>v_do_subst_enter()<cr>
+
+" gS is like gs, except it:
+"
+"  * doesn't feed a newline at the end
+"  * doesn't wrap the string to substitue in word boundaries.
+noremap  <silent> gS :set operatorfunc=<SID>do_subst_no_enter<cr>g@
+vnoremap <silent> gS :call <SID>v_do_subst_no_enter()<cr>
+
+function! s:do_subst_enter(...) abort
+  call s:do_subst_priv("'[", "']", v:true)
+endfunction
+
+function! s:do_subst_no_enter(...) abort
+  call s:do_subst_priv("'[", "']", v:false)
+endfunction
+
+function! s:v_do_subst_enter(...) abort
+  call s:do_subst_priv("'<", "'>", v:true)
+
+endfunction
+
+function! s:v_do_subst_no_enter(...) abort
+  call s:do_subst_priv("'<", "'>", v:false)
+endfunction
+
+function! s:do_subst_priv(m0, m1, do_enter) abort
+  let [_, lnum0, _, _] = getpos(a:m0)
+  let [_, lnum1, _, _] = getpos(a:m1)
+
+  " Need to call feedkeys() because @. may contain special characters like
+  " backspace.
+  call feedkeys(
+        \ printf(
+        \ ":%d,%d s/\\V%s%s%s/%s/g%s",
+        \ lnum0,
+        \ lnum1,
+        \ a:do_enter ? "\\<" : "",
+        \ escape(@", '/\'),
+        \ a:do_enter ? "\\>" : "",
+        \ escape(@., '/\'),
+        \ a:do_enter ? "\n" : ""))
 endfunction
-- 
cgit